<!--SIF Implementation Specification 2.2-6 (March 17, 2008)-->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" targetNamespace="http://www.sifinfo.org/infrastructure/2.x" xmlns:sif="http://www.sifinfo.org/infrastructure/2.x" elementFormDefault="qualified">
  <xs:import namespace="http://www.w3.org/XML/1998/namespace" schemaLocation="imports/xml/xml.xsd" />
  <xs:complexType name="SIF_ZoneStatusType">
    <xs:sequence>
      <xs:element name="SIF_Name" type="xs:normalizedString" />
      <xs:element name="SIF_Icon" minOccurs="0" type="xs:anyURI" />
      <xs:element name="SIF_Vendor" minOccurs="0">
        <xs:complexType>
          <xs:sequence>
            <xs:element name="SIF_Name" type="xs:normalizedString" />
            <xs:element name="SIF_Product" type="xs:normalizedString" />
            <xs:element name="SIF_Version" type="xs:normalizedString" />
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="SIF_Providers" minOccurs="0">
        <xs:complexType>
          <xs:sequence>
            <xs:element name="SIF_Provider" maxOccurs="unbounded">
              <xs:complexType>
                <xs:sequence>
                  <xs:element name="SIF_ObjectList">
                    <xs:complexType>
                      <xs:sequence>
                        <xs:element name="SIF_Object" maxOccurs="unbounded">
                          <xs:complexType>
                            <xs:sequence>
                              <xs:element name="SIF_ExtendedQuerySupport" type="xs:boolean" />
                              <xs:element name="SIF_Contexts" type="sif:SIF_ContextsType" />
                            </xs:sequence>
                            <xs:attribute name="ObjectName" use="required" type="sif:ObjectNameType" />
                          </xs:complexType>
                        </xs:element>
                      </xs:sequence>
                    </xs:complexType>
                  </xs:element>
                </xs:sequence>
                <xs:attribute name="SourceId" use="required">
                  <xs:simpleType>
                    <xs:restriction base="xs:token">
                      <xs:maxLength value="64" xmlns:xs="http://www.w3.org/2001/XMLSchema" />
                    </xs:restriction>
                  </xs:simpleType>
                </xs:attribute>
              </xs:complexType>
            </xs:element>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="SIF_Subscribers" minOccurs="0">
        <xs:complexType>
          <xs:sequence>
            <xs:element name="SIF_Subscriber" maxOccurs="unbounded">
              <xs:complexType>
                <xs:sequence>
                  <xs:element name="SIF_ObjectList">
                    <xs:complexType>
                      <xs:sequence>
                        <xs:element name="SIF_Object" maxOccurs="unbounded">
                          <xs:complexType>
                            <xs:sequence>
                              <xs:element name="SIF_Contexts" type="sif:SIF_ContextsType" />
                            </xs:sequence>
                            <xs:attribute name="ObjectName" use="required" type="sif:ObjectNameType" />
                          </xs:complexType>
                        </xs:element>
                      </xs:sequence>
                    </xs:complexType>
                  </xs:element>
                </xs:sequence>
                <xs:attribute name="SourceId" use="required">
                  <xs:simpleType>
                    <xs:restriction base="xs:token">
                      <xs:maxLength value="64" xmlns:xs="http://www.w3.org/2001/XMLSchema" />
                    </xs:restriction>
                  </xs:simpleType>
                </xs:attribute>
              </xs:complexType>
            </xs:element>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="SIF_AddPublishers" minOccurs="0">
        <xs:complexType>
          <xs:sequence>
            <xs:element name="SIF_Publisher" maxOccurs="unbounded">
              <xs:complexType>
                <xs:sequence>
                  <xs:element name="SIF_ObjectList">
                    <xs:complexType>
                      <xs:sequence>
                        <xs:element name="SIF_Object" maxOccurs="unbounded">
                          <xs:complexType>
                            <xs:sequence>
                              <xs:element name="SIF_Contexts" type="sif:SIF_ContextsType" />
                            </xs:sequence>
                            <xs:attribute name="ObjectName" use="required" type="sif:ObjectNameType" />
                          </xs:complexType>
                        </xs:element>
                      </xs:sequence>
                    </xs:complexType>
                  </xs:element>
                </xs:sequence>
                <xs:attribute name="SourceId" use="required">
                  <xs:simpleType>
                    <xs:restriction base="xs:token">
                      <xs:maxLength value="64" xmlns:xs="http://www.w3.org/2001/XMLSchema" />
                    </xs:restriction>
                  </xs:simpleType>
                </xs:attribute>
              </xs:complexType>
            </xs:element>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="SIF_ChangePublishers" minOccurs="0">
        <xs:complexType>
          <xs:sequence>
            <xs:element name="SIF_Publisher" maxOccurs="unbounded">
              <xs:complexType>
                <xs:sequence>
                  <xs:element name="SIF_ObjectList">
                    <xs:complexType>
                      <xs:sequence>
                        <xs:element name="SIF_Object" maxOccurs="unbounded">
                          <xs:complexType>
                            <xs:sequence>
                              <xs:element name="SIF_Contexts" type="sif:SIF_ContextsType" />
                            </xs:sequence>
                            <xs:attribute name="ObjectName" use="required" type="sif:ObjectNameType" />
                          </xs:complexType>
                        </xs:element>
                      </xs:sequence>
                    </xs:complexType>
                  </xs:element>
                </xs:sequence>
                <xs:attribute name="SourceId" use="required">
                  <xs:simpleType>
                    <xs:restriction base="xs:token">
                      <xs:maxLength value="64" xmlns:xs="http://www.w3.org/2001/XMLSchema" />
                    </xs:restriction>
                  </xs:simpleType>
                </xs:attribute>
              </xs:complexType>
            </xs:element>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="SIF_DeletePublishers" minOccurs="0">
        <xs:complexType>
          <xs:sequence>
            <xs:element name="SIF_Publisher" maxOccurs="unbounded">
              <xs:complexType>
                <xs:sequence>
                  <xs:element name="SIF_ObjectList">
                    <xs:complexType>
                      <xs:sequence>
                        <xs:element name="SIF_Object" maxOccurs="unbounded">
                          <xs:complexType>
                            <xs:sequence>
                              <xs:element name="SIF_Contexts" type="sif:SIF_ContextsType" />
                            </xs:sequence>
                            <xs:attribute name="ObjectName" use="required" type="sif:ObjectNameType" />
                          </xs:complexType>
                        </xs:element>
                      </xs:sequence>
                    </xs:complexType>
                  </xs:element>
                </xs:sequence>
                <xs:attribute name="SourceId" use="required">
                  <xs:simpleType>
                    <xs:restriction base="xs:token">
                      <xs:maxLength value="64" xmlns:xs="http://www.w3.org/2001/XMLSchema" />
                    </xs:restriction>
                  </xs:simpleType>
                </xs:attribute>
              </xs:complexType>
            </xs:element>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="SIF_Responders" minOccurs="0">
        <xs:complexType>
          <xs:sequence>
            <xs:element name="SIF_Responder" maxOccurs="unbounded">
              <xs:complexType>
                <xs:sequence>
                  <xs:element name="SIF_ObjectList">
                    <xs:complexType>
                      <xs:sequence>
                        <xs:element name="SIF_Object" maxOccurs="unbounded">
                          <xs:complexType>
                            <xs:sequence>
                              <xs:element name="SIF_ExtendedQuerySupport" type="xs:boolean" />
                              <xs:element name="SIF_Contexts" type="sif:SIF_ContextsType" />
                            </xs:sequence>
                            <xs:attribute name="ObjectName" use="required" type="sif:ObjectNameType" />
                          </xs:complexType>
                        </xs:element>
                      </xs:sequence>
                    </xs:complexType>
                  </xs:element>
                </xs:sequence>
                <xs:attribute name="SourceId" use="required">
                  <xs:simpleType>
                    <xs:restriction base="xs:token">
                      <xs:maxLength value="64" xmlns:xs="http://www.w3.org/2001/XMLSchema" />
                    </xs:restriction>
                  </xs:simpleType>
                </xs:attribute>
              </xs:complexType>
            </xs:element>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="SIF_Requesters" minOccurs="0">
        <xs:complexType>
          <xs:sequence>
            <xs:element name="SIF_Requester" maxOccurs="unbounded">
              <xs:complexType>
                <xs:sequence>
                  <xs:element name="SIF_ObjectList">
                    <xs:complexType>
                      <xs:sequence>
                        <xs:element name="SIF_Object" maxOccurs="unbounded">
                          <xs:complexType>
                            <xs:sequence>
                              <xs:element name="SIF_ExtendedQuerySupport" type="xs:boolean" />
                              <xs:element name="SIF_Contexts" type="sif:SIF_ContextsType" />
                            </xs:sequence>
                            <xs:attribute name="ObjectName" use="required" type="sif:ObjectNameType" />
                          </xs:complexType>
                        </xs:element>
                      </xs:sequence>
                    </xs:complexType>
                  </xs:element>
                </xs:sequence>
                <xs:attribute name="SourceId" use="required">
                  <xs:simpleType>
                    <xs:restriction base="xs:token">
                      <xs:maxLength value="64" xmlns:xs="http://www.w3.org/2001/XMLSchema" />
                    </xs:restriction>
                  </xs:simpleType>
                </xs:attribute>
              </xs:complexType>
            </xs:element>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="SIF_SIFNodes" minOccurs="0">
        <xs:complexType>
          <xs:sequence>
            <xs:element name="SIF_SIFNode" maxOccurs="unbounded">
              <xs:complexType>
                <xs:sequence>
                  <xs:element name="SIF_Name" type="xs:normalizedString" />
                  <xs:element name="SIF_Icon" minOccurs="0" type="xs:anyURI" />
                  <xs:element name="SIF_NodeVendor" minOccurs="0">
                    <xs:simpleType>
                      <xs:restriction base="xs:normalizedString">
                        <xs:maxLength value="256" xmlns:xs="http://www.w3.org/2001/XMLSchema" />
                      </xs:restriction>
                    </xs:simpleType>
                  </xs:element>
                  <xs:element name="SIF_NodeVersion" minOccurs="0">
                    <xs:simpleType>
                      <xs:restriction base="xs:normalizedString">
                        <xs:maxLength value="32" xmlns:xs="http://www.w3.org/2001/XMLSchema" />
                      </xs:restriction>
                    </xs:simpleType>
                  </xs:element>
                  <xs:element name="SIF_Application" minOccurs="0">
                    <xs:complexType>
                      <xs:sequence>
                        <xs:element name="SIF_Vendor">
                          <xs:simpleType>
                            <xs:restriction base="xs:normalizedString">
                              <xs:maxLength value="256" xmlns:xs="http://www.w3.org/2001/XMLSchema" />
                            </xs:restriction>
                          </xs:simpleType>
                        </xs:element>
                        <xs:element name="SIF_Product">
                          <xs:simpleType>
                            <xs:restriction base="xs:normalizedString">
                              <xs:maxLength value="256" xmlns:xs="http://www.w3.org/2001/XMLSchema" />
                            </xs:restriction>
                          </xs:simpleType>
                        </xs:element>
                        <xs:element name="SIF_Version">
                          <xs:simpleType>
                            <xs:restriction base="xs:normalizedString">
                              <xs:maxLength value="32" xmlns:xs="http://www.w3.org/2001/XMLSchema" />
                            </xs:restriction>
                          </xs:simpleType>
                        </xs:element>
                      </xs:sequence>
                    </xs:complexType>
                  </xs:element>
                  <xs:element name="SIF_SourceId">
                    <xs:simpleType>
                      <xs:restriction base="xs:token">
                        <xs:maxLength value="64" xmlns:xs="http://www.w3.org/2001/XMLSchema" />
                      </xs:restriction>
                    </xs:simpleType>
                  </xs:element>
                  <xs:element name="SIF_Mode">
                    <xs:simpleType>
                      <xs:restriction base="xs:token">
                        <xs:enumeration value="Push" />
                        <xs:enumeration value="Pull" />
                      </xs:restriction>
                    </xs:simpleType>
                  </xs:element>
                  <xs:element name="SIF_Protocol" minOccurs="0" type="sif:SIF_ProtocolType" />
                  <xs:element name="SIF_VersionList">
                    <xs:complexType>
                      <xs:sequence>
                        <xs:element name="SIF_Version" maxOccurs="unbounded" type="sif:VersionWithWildcardsType" />
                      </xs:sequence>
                    </xs:complexType>
                  </xs:element>
                  <xs:element name="SIF_AuthenticationLevel" minOccurs="0" type="sif:SIF_AuthenticationLevelType" />
                  <xs:element name="SIF_EncryptionLevel" minOccurs="0" type="sif:SIF_EncryptionLevelType" />
                  <xs:element name="SIF_MaxBufferSize" type="xs:unsignedInt" />
                  <xs:element name="SIF_Sleeping">
                    <xs:simpleType>
                      <xs:restriction base="xs:token">
                        <xs:enumeration value="No" />
                        <xs:enumeration value="Yes" />
                      </xs:restriction>
                    </xs:simpleType>
                  </xs:element>
                </xs:sequence>
                <xs:attribute name="Type" use="required">
                  <xs:simpleType>
                    <xs:restriction base="xs:token">
                      <xs:enumeration value="Agent" />
                      <xs:enumeration value="ZIS" />
                    </xs:restriction>
                  </xs:simpleType>
                </xs:attribute>
              </xs:complexType>
            </xs:element>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="SIF_SupportedAuthentication" minOccurs="0">
        <xs:complexType>
          <xs:sequence>
            <xs:element name="SIF_ProtocolName" maxOccurs="unbounded">
              <xs:simpleType>
                <xs:restriction base="xs:token">
                  <xs:enumeration value="X.509" />
                </xs:restriction>
              </xs:simpleType>
            </xs:element>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="SIF_SupportedProtocols">
        <xs:complexType>
          <xs:sequence>
            <xs:element name="SIF_Protocol" maxOccurs="unbounded" type="sif:SIF_ProtocolType" />
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="SIF_SupportedVersions">
        <xs:complexType>
          <xs:sequence>
            <xs:element name="SIF_Version" maxOccurs="unbounded" type="sif:VersionType" />
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="SIF_AdministrationURL" minOccurs="0" type="xs:anyURI" />
      <xs:element name="SIF_Contexts" type="sif:SIF_ContextsType" />
      <xs:element name="SIF_Metadata" minOccurs="0" type="sif:SIF_MetadataType" />
      <xs:element name="SIF_ExtendedElements" minOccurs="0" type="sif:SIF_ExtendedElementsType" />
    </xs:sequence>
    <xs:attribute name="ZoneId" use="required" type="xs:token" />
  </xs:complexType>

  <xs:element name="SIF_ZoneStatus" type="sif:SIF_ZoneStatusType" />

  <xs:complexType name="SIF_ZoneStatusInfrastructureType">
    <xs:sequence>
      <xs:element name="SIF_Name" type="xs:normalizedString" />
      <xs:element name="SIF_Icon" minOccurs="0" type="xs:anyURI" />
      <xs:element name="SIF_Vendor" minOccurs="0">
        <xs:complexType>
          <xs:sequence>
            <xs:element name="SIF_Name" type="xs:normalizedString" />
            <xs:element name="SIF_Product" type="xs:normalizedString" />
            <xs:element name="SIF_Version" type="xs:normalizedString" />
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="SIF_Providers" minOccurs="0">
        <xs:complexType>
          <xs:sequence>
            <xs:element name="SIF_Provider" maxOccurs="unbounded">
              <xs:complexType>
                <xs:sequence>
                  <xs:element name="SIF_ObjectList">
                    <xs:complexType>
                      <xs:sequence>
                        <xs:element name="SIF_Object" maxOccurs="unbounded">
                          <xs:complexType>
                            <xs:sequence>
                              <xs:element name="SIF_ExtendedQuerySupport" type="xs:boolean" />
                              <xs:element name="SIF_Contexts" type="sif:SIF_ContextsType" />
                            </xs:sequence>
                            <xs:attribute name="ObjectName" use="required" type="sif:ObjectNameType" />
                          </xs:complexType>
                        </xs:element>
                      </xs:sequence>
                    </xs:complexType>
                  </xs:element>
                </xs:sequence>
                <xs:attribute name="SourceId" use="required">
                  <xs:simpleType>
                    <xs:restriction base="xs:token">
                      <xs:maxLength value="64" xmlns:xs="http://www.w3.org/2001/XMLSchema" />
                    </xs:restriction>
                  </xs:simpleType>
                </xs:attribute>
              </xs:complexType>
            </xs:element>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="SIF_Subscribers" minOccurs="0">
        <xs:complexType>
          <xs:sequence>
            <xs:element name="SIF_Subscriber" maxOccurs="unbounded">
              <xs:complexType>
                <xs:sequence>
                  <xs:element name="SIF_ObjectList">
                    <xs:complexType>
                      <xs:sequence>
                        <xs:element name="SIF_Object" maxOccurs="unbounded">
                          <xs:complexType>
                            <xs:sequence>
                              <xs:element name="SIF_Contexts" type="sif:SIF_ContextsType" />
                            </xs:sequence>
                            <xs:attribute name="ObjectName" use="required" type="sif:ObjectNameType" />
                          </xs:complexType>
                        </xs:element>
                      </xs:sequence>
                    </xs:complexType>
                  </xs:element>
                </xs:sequence>
                <xs:attribute name="SourceId" use="required">
                  <xs:simpleType>
                    <xs:restriction base="xs:token">
                      <xs:maxLength value="64" xmlns:xs="http://www.w3.org/2001/XMLSchema" />
                    </xs:restriction>
                  </xs:simpleType>
                </xs:attribute>
              </xs:complexType>
            </xs:element>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="SIF_AddPublishers" minOccurs="0">
        <xs:complexType>
          <xs:sequence>
            <xs:element name="SIF_Publisher" maxOccurs="unbounded">
              <xs:complexType>
                <xs:sequence>
                  <xs:element name="SIF_ObjectList">
                    <xs:complexType>
                      <xs:sequence>
                        <xs:element name="SIF_Object" maxOccurs="unbounded">
                          <xs:complexType>
                            <xs:sequence>
                              <xs:element name="SIF_Contexts" type="sif:SIF_ContextsType" />
                            </xs:sequence>
                            <xs:attribute name="ObjectName" use="required" type="sif:ObjectNameType" />
                          </xs:complexType>
                        </xs:element>
                      </xs:sequence>
                    </xs:complexType>
                  </xs:element>
                </xs:sequence>
                <xs:attribute name="SourceId" use="required">
                  <xs:simpleType>
                    <xs:restriction base="xs:token">
                      <xs:maxLength value="64" xmlns:xs="http://www.w3.org/2001/XMLSchema" />
                    </xs:restriction>
                  </xs:simpleType>
                </xs:attribute>
              </xs:complexType>
            </xs:element>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="SIF_ChangePublishers" minOccurs="0">
        <xs:complexType>
          <xs:sequence>
            <xs:element name="SIF_Publisher" maxOccurs="unbounded">
              <xs:complexType>
                <xs:sequence>
                  <xs:element name="SIF_ObjectList">
                    <xs:complexType>
                      <xs:sequence>
                        <xs:element name="SIF_Object" maxOccurs="unbounded">
                          <xs:complexType>
                            <xs:sequence>
                              <xs:element name="SIF_Contexts" type="sif:SIF_ContextsType" />
                            </xs:sequence>
                            <xs:attribute name="ObjectName" use="required" type="sif:ObjectNameType" />
                          </xs:complexType>
                        </xs:element>
                      </xs:sequence>
                    </xs:complexType>
                  </xs:element>
                </xs:sequence>
                <xs:attribute name="SourceId" use="required">
                  <xs:simpleType>
                    <xs:restriction base="xs:token">
                      <xs:maxLength value="64" xmlns:xs="http://www.w3.org/2001/XMLSchema" />
                    </xs:restriction>
                  </xs:simpleType>
                </xs:attribute>
              </xs:complexType>
            </xs:element>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="SIF_DeletePublishers" minOccurs="0">
        <xs:complexType>
          <xs:sequence>
            <xs:element name="SIF_Publisher" maxOccurs="unbounded">
              <xs:complexType>
                <xs:sequence>
                  <xs:element name="SIF_ObjectList">
                    <xs:complexType>
                      <xs:sequence>
                        <xs:element name="SIF_Object" maxOccurs="unbounded">
                          <xs:complexType>
                            <xs:sequence>
                              <xs:element name="SIF_Contexts" type="sif:SIF_ContextsType" />
                            </xs:sequence>
                            <xs:attribute name="ObjectName" use="required" type="sif:ObjectNameType" />
                          </xs:complexType>
                        </xs:element>
                      </xs:sequence>
                    </xs:complexType>
                  </xs:element>
                </xs:sequence>
                <xs:attribute name="SourceId" use="required">
                  <xs:simpleType>
                    <xs:restriction base="xs:token">
                      <xs:maxLength value="64" xmlns:xs="http://www.w3.org/2001/XMLSchema" />
                    </xs:restriction>
                  </xs:simpleType>
                </xs:attribute>
              </xs:complexType>
            </xs:element>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="SIF_Responders" minOccurs="0">
        <xs:complexType>
          <xs:sequence>
            <xs:element name="SIF_Responder" maxOccurs="unbounded">
              <xs:complexType>
                <xs:sequence>
                  <xs:element name="SIF_ObjectList">
                    <xs:complexType>
                      <xs:sequence>
                        <xs:element name="SIF_Object" maxOccurs="unbounded">
                          <xs:complexType>
                            <xs:sequence>
                              <xs:element name="SIF_ExtendedQuerySupport" type="xs:boolean" />
                              <xs:element name="SIF_Contexts" type="sif:SIF_ContextsType" />
                            </xs:sequence>
                            <xs:attribute name="ObjectName" use="required" type="sif:ObjectNameType" />
                          </xs:complexType>
                        </xs:element>
                      </xs:sequence>
                    </xs:complexType>
                  </xs:element>
                </xs:sequence>
                <xs:attribute name="SourceId" use="required">
                  <xs:simpleType>
                    <xs:restriction base="xs:token">
                      <xs:maxLength value="64" xmlns:xs="http://www.w3.org/2001/XMLSchema" />
                    </xs:restriction>
                  </xs:simpleType>
                </xs:attribute>
              </xs:complexType>
            </xs:element>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="SIF_Requesters" minOccurs="0">
        <xs:complexType>
          <xs:sequence>
            <xs:element name="SIF_Requester" maxOccurs="unbounded">
              <xs:complexType>
                <xs:sequence>
                  <xs:element name="SIF_ObjectList">
                    <xs:complexType>
                      <xs:sequence>
                        <xs:element name="SIF_Object" maxOccurs="unbounded">
                          <xs:complexType>
                            <xs:sequence>
                              <xs:element name="SIF_ExtendedQuerySupport" type="xs:boolean" />
                              <xs:element name="SIF_Contexts" type="sif:SIF_ContextsType" />
                            </xs:sequence>
                            <xs:attribute name="ObjectName" use="required" type="sif:ObjectNameType" />
                          </xs:complexType>
                        </xs:element>
                      </xs:sequence>
                    </xs:complexType>
                  </xs:element>
                </xs:sequence>
                <xs:attribute name="SourceId" use="required">
                  <xs:simpleType>
                    <xs:restriction base="xs:token">
                      <xs:maxLength value="64" xmlns:xs="http://www.w3.org/2001/XMLSchema" />
                    </xs:restriction>
                  </xs:simpleType>
                </xs:attribute>
              </xs:complexType>
            </xs:element>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="SIF_SIFNodes" minOccurs="0">
        <xs:complexType>
          <xs:sequence>
            <xs:element name="SIF_SIFNode" maxOccurs="unbounded">
              <xs:complexType>
                <xs:sequence>
                  <xs:element name="SIF_Name" type="xs:normalizedString" />
                  <xs:element name="SIF_Icon" minOccurs="0" type="xs:anyURI" />
                  <xs:element name="SIF_NodeVendor" minOccurs="0">
                    <xs:simpleType>
                      <xs:restriction base="xs:normalizedString">
                        <xs:maxLength value="256" xmlns:xs="http://www.w3.org/2001/XMLSchema" />
                      </xs:restriction>
                    </xs:simpleType>
                  </xs:element>
                  <xs:element name="SIF_NodeVersion" minOccurs="0">
                    <xs:simpleType>
                      <xs:restriction base="xs:normalizedString">
                        <xs:maxLength value="32" xmlns:xs="http://www.w3.org/2001/XMLSchema" />
                      </xs:restriction>
                    </xs:simpleType>
                  </xs:element>
                  <xs:element name="SIF_Application" minOccurs="0">
                    <xs:complexType>
                      <xs:sequence>
                        <xs:element name="SIF_Vendor">
                          <xs:simpleType>
                            <xs:restriction base="xs:normalizedString">
                              <xs:maxLength value="256" xmlns:xs="http://www.w3.org/2001/XMLSchema" />
                            </xs:restriction>
                          </xs:simpleType>
                        </xs:element>
                        <xs:element name="SIF_Product">
                          <xs:simpleType>
                            <xs:restriction base="xs:normalizedString">
                              <xs:maxLength value="256" xmlns:xs="http://www.w3.org/2001/XMLSchema" />
                            </xs:restriction>
                          </xs:simpleType>
                        </xs:element>
                        <xs:element name="SIF_Version">
                          <xs:simpleType>
                            <xs:restriction base="xs:normalizedString">
                              <xs:maxLength value="32" xmlns:xs="http://www.w3.org/2001/XMLSchema" />
                            </xs:restriction>
                          </xs:simpleType>
                        </xs:element>
                      </xs:sequence>
                    </xs:complexType>
                  </xs:element>
                  <xs:element name="SIF_SourceId">
                    <xs:simpleType>
                      <xs:restriction base="xs:token">
                        <xs:maxLength value="64" xmlns:xs="http://www.w3.org/2001/XMLSchema" />
                      </xs:restriction>
                    </xs:simpleType>
                  </xs:element>
                  <xs:element name="SIF_Mode">
                    <xs:simpleType>
                      <xs:restriction base="xs:token">
                        <xs:enumeration value="Push" />
                        <xs:enumeration value="Pull" />
                      </xs:restriction>
                    </xs:simpleType>
                  </xs:element>
                  <xs:element name="SIF_Protocol" minOccurs="0" type="sif:SIF_ProtocolType" />
                  <xs:element name="SIF_VersionList">
                    <xs:complexType>
                      <xs:sequence>
                        <xs:element name="SIF_Version" maxOccurs="unbounded" type="sif:VersionWithWildcardsType" />
                      </xs:sequence>
                    </xs:complexType>
                  </xs:element>
                  <xs:element name="SIF_AuthenticationLevel" minOccurs="0" type="sif:SIF_AuthenticationLevelType" />
                  <xs:element name="SIF_EncryptionLevel" minOccurs="0" type="sif:SIF_EncryptionLevelType" />
                  <xs:element name="SIF_MaxBufferSize" type="xs:unsignedInt" />
                  <xs:element name="SIF_Sleeping">
                    <xs:simpleType>
                      <xs:restriction base="xs:token">
                        <xs:enumeration value="No" />
                        <xs:enumeration value="Yes" />
                      </xs:restriction>
                    </xs:simpleType>
                  </xs:element>
                </xs:sequence>
                <xs:attribute name="Type" use="required">
                  <xs:simpleType>
                    <xs:restriction base="xs:token">
                      <xs:enumeration value="Agent" />
                      <xs:enumeration value="ZIS" />
                    </xs:restriction>
                  </xs:simpleType>
                </xs:attribute>
              </xs:complexType>
            </xs:element>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="SIF_SupportedAuthentication" minOccurs="0">
        <xs:complexType>
          <xs:sequence>
            <xs:element name="SIF_ProtocolName" maxOccurs="unbounded">
              <xs:simpleType>
                <xs:restriction base="xs:token">
                  <xs:enumeration value="X.509" />
                </xs:restriction>
              </xs:simpleType>
            </xs:element>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="SIF_SupportedProtocols">
        <xs:complexType>
          <xs:sequence>
            <xs:element name="SIF_Protocol" maxOccurs="unbounded" type="sif:SIF_ProtocolType" />
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="SIF_SupportedVersions">
        <xs:complexType>
          <xs:sequence>
            <xs:element name="SIF_Version" maxOccurs="unbounded" type="sif:VersionType" />
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="SIF_AdministrationURL" minOccurs="0" type="xs:anyURI" />
      <xs:element name="SIF_Contexts" type="sif:SIF_ContextsType" />
      <xs:element name="SIF_Metadata" minOccurs="0" type="sif:SIF_MetadataType" />
      <xs:element name="SIF_ExtendedElements" minOccurs="0" type="sif:SIF_ExtendedElementsType" />
    </xs:sequence>
    <xs:attribute name="ZoneId" use="required" type="xs:token" />
  </xs:complexType>

</xs:schema>